“It sounds really cool, but I’m waiting to see if it really works. I’m afraid that there’ll be a lot of glitches or they’ll run out of items really quickly,” Fiona Guedalia, 26, said outside the Trader Joe’s supermarket on the Upper West Side.

“I feel like in the end, I’ll end up in Trader Joe’s anyway, because I can’t imagine the prices being cheaper.”

“It gets so busy here, so I would like to see how they’re going to keep track of five people going out at once,” she said.

Strez, 36, also said she was unlikely to pay Amazon’s “Prime” membership fee to avoid standing in line to buy her groceries.

“I’m a cheap person. I usually go to three different markets to make sure I get the cheapest prices,” she said.

Several shoppers also said privacy concerns would keep them from embracing Amazon’s app-based concept.

“It’s like ‘Big Brother.’ It’s kind of freaky. It’s good that you don’t have to wait on line, but there has to be some level of privacy,” said Laura Beth Gilman, 47.

Dennis Hunt, 73, noted that “we’re not even sure if our own government is able to protect our private information,” while Natalie Fisher, 64, said she didn’t trust “any app or device” with her personal data.